Self-supporting bicycle-pump.



UNTTED STATES PATENT OFFICE.

ROBERT NELSON HATCH, OFVVVOODSTOCK, CANADA.

SELF-SUPPORTING BICYCLE-PUMP.

SEKECIFIGATION forming part of Letters Patent No. 660,509. dated October 23, 1900. Application filed October 7, 1.8997 Serial No. 732,935. LNO DlOdeL) To @ZZ whom, it' may concern/r Beit known that I, ROBERT NELSON HATCH,

of the town of Woodstock, in the county ofl Oxford, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Self- Supporting Bicycle- Pumps, of which the following is a specification.

My invention relates toimprovements in bi:

cycle-pump couplings; and the object of the invention is to provide an eficient means for connecting a pump to the Valve of a bicyclelire, which maybe done quickly and Without unnecessary laborand which will also be flexible lo such a degree as to prevent any injury to the connection during the process of pumping; and it consists, essentially, of having the air-tubeleading from the pump connected to the valve by a ball-and-socket joint and a cap connected to the top of the valve-stem in the manner hereinafter more particularly explained.

Figure lis a perspective view of a portion of a bicycle rim and tire, showing my improved pump and connection to the valve. Fig. la is a detail view of means for holding a valvestem rigid. Fig. '2 is an enlarged detail of the preferred form of connection. Figs. 3, 4, and 5 are details of alternative forms.

In the drawings like letters of reference indicate corresponding parts in each figure.

A is the rim of the bicycle-tire; B, the tire; C, the valve-stem, provided with a screwed upper end, and D is the bicycle-pump, which is made of two telescopic portions (l and el', the portion d having a washer d2 in order to make it air-tight. This pump operates in the usual way.

E is an ai r-tube connected to the valve-piston and provided with a threaded end which is screwed onto the threaded end f of the ball-stein F. The ball f is formed at the lower end of the stem, and a central passageway f2 is provided. The ball fits within a socket Gr and is provided with an open mouth f3 at the end of the passageway. The socket G is provided with a downwardly-extending ange g, fitting over the threaded top c of the valve-stem, and a washer g is provided at the bottom of the socket and the top of the valve-stem. On pins g2 on the socket G is pivotally swung the grip H, which is provided with a loop h for operating it and knurled extensions 7L', so that when the grip is swung into the position shown in Fig. 2 the knurled extensions will fit intothethread and prevent the withdrawal of the socket from the top of the stem. In order to remove the grip, it is merely necessary to pull outwardly upon the loop h until the extensions h are thrown free of the thread. The socket G is also provided.

upon the socket G2, which in this instance' has a narrow socket g4 at the top of the stem c. The tube E of the pump is designed to extend through the spring-fingers I' of the cap I and is formed with a ball E2 at the end thereof, which lits the narrow socket g4. A rubber washer D is provided underneath the cap I, and when the cap is down it is swung into the position shown in Fig. 5 and completely closes the top of the valve-stem. Of course before the cap I is put on the ball end of the tube E must be Withdrawn from the spring-fingers I.

In the construction I have before referred to, particularly as to Figs. 1 and 2, it Will be seen that I am enabled by the telescopic form of the pump to form a compact air-pump, which inworking position will necessarily enable me to fill the tire much more quickly than with the ordinary pumps now in use. I can also manipulate my pump with less care as to the position of the connection of the valve without deleteriously affecting such connection. The pump is also more readily connected to the valve, as there is only one connection, and there is no rubber tube likely to be burst or spoiled during the pumping.

In case the valve-stem is of rubber or other flexible material it is necessary that I should hold the same more rigid, and for this purpose I use in connection with my ball-andsocket joint a bridge J, which straddles the rim and encircles the stem, as indicated in Figs. l and la. A set-screwj extends through IOO side of the center hole 7'2 of the bridge, and as this set-screw has an enlarged end it can be tightened onto the valve-stem, so as to hold it rigid, no matter what height suoli Valvestem projects above the rim of the Wheel.

What I claim as my invention is- 1. An air-pump comprising a barrel and a hollow piston-rod adapted to reciprocate and rotate therein and having a coupling formed with a round or spherical metal conduit rigidly eonneeted withthe end of said pistonrod and a secondary section or supplementary conduit overlapping the said spherical conduit so as to give a flexible or universal movement iu relation to the same and means for attaching the same to a pneumatic-tire valve.

2. In a bicycle-pump coupling, the combination With the air-expelling tube, of a ball formed at the end thereof, a socket fitting on the ball and provided with a central passageway and a downwardly-extending external flange fitting over the stem, and a Igrip pivoted on the soeket and having an extensionolasp to fit the thread as and for the purpose specified.

In a bicycle-pump coupling, the combination with the air-expelling tube, and a eonneotion fitting over the stem of the valve, of a grip pivoted on the connection and having an extension-clasp to fit. the thread as and for the purpose specified.

4. In a device of the class described the combination with the valve-stein, of a bridge fitting on the rim ofthe bieyele and provided with a Central orifice and a set-screw eXtending through a projection extending upwardly from the bridge and designed to clamp the siem rmlyin position as and for the purpose specified.

ROBERT NELSON HATCH.

Witnesses:

B. BOYD, A. DENNisoN. 

